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<a name="1" href="#1">1</a>   <em>/**<em>*</em></em>
<a name="2" href="#2">2</a>   <em> * $Id: EntityDataUtils.html 12 2009-01-29 12:00:24Z azeckoski $</em>
<a name="3" href="#3">3</a>   <em> * $URL: http://entitybus.googlecode.com/svn/maven/site/entitybus-utils/xref/org/sakaiproject/entitybus/util/EntityDataUtils.html $</em>
<a name="4" href="#4">4</a>   <em> * EntityDataUtils.java - entity-broker - Aug 11, 2008 2:58:03 PM - azeckoski</em>
<a name="5" href="#5">5</a>   <em> **************************************************************************</em>
<a name="6" href="#6">6</a>   <em> * Copyright (c) 2008 Sakai Foundation</em>
<a name="7" href="#7">7</a>   <em> *</em>
<a name="8" href="#8">8</a>   <em> * Licensed under the Educational Community License, Version 2.0 (the "License");</em>
<a name="9" href="#9">9</a>   <em> * you may not use this file except in compliance with the License.</em>
<a name="10" href="#10">10</a>  <em> * You may obtain a copy of the License at</em>
<a name="11" href="#11">11</a>  <em> *</em>
<a name="12" href="#12">12</a>  <em> *       <a href="http://www.osedu.org/licenses/ECL-2.0" target="alexandria_uri">http://www.osedu.org/licenses/ECL-2.0</a></em>
<a name="13" href="#13">13</a>  <em> *</em>
<a name="14" href="#14">14</a>  <em> * Unless required by applicable law or agreed to in writing, software</em>
<a name="15" href="#15">15</a>  <em> * distributed under the License is distributed on an "AS IS" BASIS,</em>
<a name="16" href="#16">16</a>  <em> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</em>
<a name="17" href="#17">17</a>  <em> * See the License for the specific language governing permissions and</em>
<a name="18" href="#18">18</a>  <em> * limitations under the License.</em>
<a name="19" href="#19">19</a>  <em> */</em>
<a name="20" href="#20">20</a>  
<a name="21" href="#21">21</a>  <strong>package</strong> org.sakaiproject.entitybus.util;
<a name="22" href="#22">22</a>  
<a name="23" href="#23">23</a>  <strong>import</strong> java.io.Serializable;
<a name="24" href="#24">24</a>  <strong>import</strong> java.util.ArrayList;
<a name="25" href="#25">25</a>  <strong>import</strong> java.util.HashMap;
<a name="26" href="#26">26</a>  <strong>import</strong> java.util.List;
<a name="27" href="#27">27</a>  <strong>import</strong> java.util.Map;
<a name="28" href="#28">28</a>  <strong>import</strong> java.util.Set;
<a name="29" href="#29">29</a>  <strong>import</strong> java.util.Map.Entry;
<a name="30" href="#30">30</a>  
<a name="31" href="#31">31</a>  <strong>import</strong> org.azeckoski.reflectutils.ReflectUtils;
<a name="32" href="#32">32</a>  <strong>import</strong> org.azeckoski.reflectutils.exceptions.FieldnameNotFoundException;
<a name="33" href="#33">33</a>  <strong>import</strong> org.sakaiproject.entitybus.EntityReference;
<a name="34" href="#34">34</a>  <strong>import</strong> org.sakaiproject.entitybus.entityprovider.annotations.EntityId;
<a name="35" href="#35">35</a>  <strong>import</strong> org.sakaiproject.entitybus.entityprovider.capabilities.CollectionResolvable;
<a name="36" href="#36">36</a>  <strong>import</strong> org.sakaiproject.entitybus.entityprovider.extension.ActionReturn;
<a name="37" href="#37">37</a>  <strong>import</strong> org.sakaiproject.entitybus.entityprovider.extension.EntityData;
<a name="38" href="#38">38</a>  <strong>import</strong> org.sakaiproject.entitybus.entityprovider.search.Restriction;
<a name="39" href="#39">39</a>  <strong>import</strong> org.sakaiproject.entitybus.entityprovider.search.Search;
<a name="40" href="#40">40</a>  
<a name="41" href="#41">41</a>  
<a name="42" href="#42">42</a>  <em>/**<em>*</em></em>
<a name="43" href="#43">43</a>  <em> * Utilities which are useful when working with {@link EntityData} objects and their properties</em>
<a name="44" href="#44">44</a>  <em> * </em>
<a name="45" href="#45">45</a>  <em> * @author Aaron Zeckoski (azeckoski @ gmail.com)</em>
<a name="46" href="#46">46</a>  <em> */</em>
<a name="47" href="#47">47</a>  <strong>public</strong> <strong>class</strong> <a href="../../../../org/sakaiproject/entitybus/util/EntityDataUtils.html">EntityDataUtils</a> {
<a name="48" href="#48">48</a>  
<a name="49" href="#49">49</a>      <em>/**<em>*</em></em>
<a name="50" href="#50">50</a>  <em>     * Convert a list of objects to entity data objects (DOES NOT populate them),</em>
<a name="51" href="#51">51</a>  <em>     * will preserve null (i.e. null in => null out)</em>
<a name="52" href="#52">52</a>  <em>     */</em>
<a name="53" href="#53">53</a>      <strong>public</strong> <strong>static</strong> List&lt;EntityData> convertToEntityData(List&lt;?> entities, EntityReference ref) {
<a name="54" href="#54">54</a>          List&lt;EntityData> l = <strong>null</strong>;
<a name="55" href="#55">55</a>          <strong>if</strong> (entities != <strong>null</strong>) {
<a name="56" href="#56">56</a>              l = <strong>new</strong> ArrayList&lt;EntityData>();
<a name="57" href="#57">57</a>              <strong>for</strong> (Object entity : entities) {
<a name="58" href="#58">58</a>                  l.add( makeEntityData(ref, entity) );
<a name="59" href="#59">59</a>              }
<a name="60" href="#60">60</a>          }
<a name="61" href="#61">61</a>          <strong>return</strong> l;
<a name="62" href="#62">62</a>      }
<a name="63" href="#63">63</a>  
<a name="64" href="#64">64</a>      <em>/**<em>*</em></em>
<a name="65" href="#65">65</a>  <em>     * Convert a single object to an entity data object (DOES NOT populate it),</em>
<a name="66" href="#66">66</a>  <em>     * will preserve null (i.e. null in => null out)</em>
<a name="67" href="#67">67</a>  <em>     */</em>
<a name="68" href="#68">68</a>      <strong>public</strong> <strong>static</strong> EntityData convertToEntityData(Object entity, EntityReference ref) {
<a name="69" href="#69">69</a>          EntityData ed = <strong>null</strong>;
<a name="70" href="#70">70</a>          <strong>if</strong> (entity != <strong>null</strong>) {
<a name="71" href="#71">71</a>              ed = makeEntityData(ref, entity);
<a name="72" href="#72">72</a>          }
<a name="73" href="#73">73</a>          <strong>return</strong> ed;
<a name="74" href="#74">74</a>      }
<a name="75" href="#75">75</a>  
<a name="76" href="#76">76</a>      <em>/**<em>*</em></em>
<a name="77" href="#77">77</a>  <em>     * Convert a list of entities / entity data to just entities,</em>
<a name="78" href="#78">78</a>  <em>     * will preserve null (i.e. null in => null out)</em>
<a name="79" href="#79">79</a>  <em>     */</em>
<a name="80" href="#80">80</a>      <strong>public</strong> <strong>static</strong> List&lt;?> convertToEntities(List&lt;?> entities) {
<a name="81" href="#81">81</a>          List&lt;Object> l = <strong>null</strong>;
<a name="82" href="#82">82</a>          <strong>if</strong> (entities != <strong>null</strong>) {
<a name="83" href="#83">83</a>              l = <strong>new</strong> ArrayList&lt;Object>();
<a name="84" href="#84">84</a>              <strong>for</strong> (Object object : entities) {
<a name="85" href="#85">85</a>                  <strong>if</strong> (object != <strong>null</strong>) {
<a name="86" href="#86">86</a>                      l.add( EntityDataUtils.convertToEntity(object) );
<a name="87" href="#87">87</a>                  }
<a name="88" href="#88">88</a>              }
<a name="89" href="#89">89</a>          }
<a name="90" href="#90">90</a>          <strong>return</strong> l;
<a name="91" href="#91">91</a>      }
<a name="92" href="#92">92</a>  
<a name="93" href="#93">93</a>      <em>/**<em>*</em></em>
<a name="94" href="#94">94</a>  <em>     * Convert an entity/data to just an entity,</em>
<a name="95" href="#95">95</a>  <em>     * will preserve null (i.e. null in => null out)</em>
<a name="96" href="#96">96</a>  <em>     */</em>
<a name="97" href="#97">97</a>      <strong>public</strong> <strong>static</strong> Object convertToEntity(Object object) {
<a name="98" href="#98">98</a>          Object togo = <strong>null</strong>;
<a name="99" href="#99">99</a>          <strong>if</strong> (object != <strong>null</strong>) {
<a name="100" href="#100">100</a>             <strong>if</strong> (EntityData.<strong>class</strong>.isAssignableFrom(object.getClass())) {
<a name="101" href="#101">101</a>                 EntityData ed = (EntityData)object;
<a name="102" href="#102">102</a>                 <strong>if</strong> (ed.getData() != <strong>null</strong>) {
<a name="103" href="#103">103</a>                     togo = ed.getData();
<a name="104" href="#104">104</a>                 } <strong>else</strong> {
<a name="105" href="#105">105</a>                     togo = ed;
<a name="106" href="#106">106</a>                 }
<a name="107" href="#107">107</a>             } <strong>else</strong> {
<a name="108" href="#108">108</a>                 togo = object;
<a name="109" href="#109">109</a>             }
<a name="110" href="#110">110</a>         }
<a name="111" href="#111">111</a>         <strong>return</strong> togo;
<a name="112" href="#112">112</a>     }
<a name="113" href="#113">113</a> 
<a name="114" href="#114">114</a>     <em>/**<em>*</em></em>
<a name="115" href="#115">115</a> <em>     * Make an entity data object out of whatever entity is given,</em>
<a name="116" href="#116">116</a> <em>     * use the given reference, if there is no id then this will attempt to get one otherwise it will use prefix only</em>
<a name="117" href="#117">117</a> <em>     */</em>
<a name="118" href="#118">118</a>     <strong>public</strong> <strong>static</strong> EntityData makeEntityData(EntityReference ref, Object entity) {
<a name="119" href="#119">119</a>         EntityData ed = <strong>null</strong>;
<a name="120" href="#120">120</a>         <strong>if</strong> (entity != <strong>null</strong>) {
<a name="121" href="#121">121</a>             <strong>if</strong> (ref == <strong>null</strong>) {
<a name="122" href="#122">122</a>                 <strong>throw</strong> <strong>new</strong> IllegalArgumentException(<span class="string">"ref must not be null or no entity data object can be created"</span>);
<a name="123" href="#123">123</a>             }
<a name="124" href="#124">124</a>             Class&lt;?> resultClass = entity.getClass();
<a name="125" href="#125">125</a>             <strong>if</strong> (EntityData.<strong>class</strong>.isAssignableFrom(resultClass)) {
<a name="126" href="#126">126</a>                 ed = (EntityData) entity;
<a name="127" href="#127">127</a>             } <strong>else</strong> {
<a name="128" href="#128">128</a>                 <strong>if</strong> (ref.getId() == <strong>null</strong>) {
<a name="129" href="#129">129</a>                     <em class="comment">// attempt to get the id if it was not provided</em>
<a name="130" href="#130">130</a>                     String entityId = <strong>null</strong>;
<a name="131" href="#131">131</a>                     <strong>try</strong> {
<a name="132" href="#132">132</a>                         entityId = ReflectUtils.getInstance().getFieldValueAsString(entity, <span class="string">"entityId"</span>, EntityId.<strong>class</strong>);
<a name="133" href="#133">133</a>                     } <strong>catch</strong> (FieldnameNotFoundException e) {
<a name="134" href="#134">134</a>                         <strong>try</strong> {
<a name="135" href="#135">135</a>                             <em class="comment">// try just id only as well</em>
<a name="136" href="#136">136</a>                             entityId = ReflectUtils.getInstance().getFieldValueAsString(entity, <span class="string">"id"</span>, <strong>null</strong>);
<a name="137" href="#137">137</a>                         } <strong>catch</strong> (FieldnameNotFoundException e1) {
<a name="138" href="#138">138</a>                             entityId = <strong>null</strong>;
<a name="139" href="#139">139</a>                         }
<a name="140" href="#140">140</a>                     }
<a name="141" href="#141">141</a>                     <strong>if</strong> (entityId != <strong>null</strong>) {
<a name="142" href="#142">142</a>                         ref = <strong>new</strong> EntityReference(ref.getPrefix(), entityId);
<a name="143" href="#143">143</a>                     }
<a name="144" href="#144">144</a>                 }
<a name="145" href="#145">145</a>                 Object entityObject = entity;
<a name="146" href="#146">146</a>                 <strong>if</strong> (ActionReturn.<strong>class</strong>.isAssignableFrom(resultClass)) {
<a name="147" href="#147">147</a>                     ActionReturn ar = (ActionReturn) entity;
<a name="148" href="#148">148</a>                     <strong>if</strong> (ar.entityData == <strong>null</strong>) {
<a name="149" href="#149">149</a>                         <em class="comment">// make entity data from AR</em>
<a name="150" href="#150">150</a>                         <strong>if</strong> (ar.outputString != <strong>null</strong>) {
<a name="151" href="#151">151</a>                             entityObject = ar.outputString;
<a name="152" href="#152">152</a>                         } <strong>else</strong> <strong>if</strong> (ar.output != <strong>null</strong>) {
<a name="153" href="#153">153</a>                             entityObject = ar.output;
<a name="154" href="#154">154</a>                         }
<a name="155" href="#155">155</a>                     } <strong>else</strong> {
<a name="156" href="#156">156</a>                         ed = ar.entityData;
<a name="157" href="#157">157</a>                     }
<a name="158" href="#158">158</a> <em class="comment">// removed because it makes a mess of the output, maybe add this in later though -AZ</em>
<a name="159" href="#159">159</a> <em class="comment">//                } else if (Map.class.isAssignableFrom(resultClass)) {</em>
<a name="160" href="#160">160</a> <em class="comment">//                    props = EntityDataUtils.extractMapProperties((Map)entity);</em>
<a name="161" href="#161">161</a>                 }
<a name="162" href="#162">162</a>                 <strong>if</strong> (ed == <strong>null</strong>) {
<a name="163" href="#163">163</a>                     ed = <strong>new</strong> EntityData(ref, <strong>null</strong>, entityObject, <strong>null</strong>);
<a name="164" href="#164">164</a>                 }
<a name="165" href="#165">165</a>             }
<a name="166" href="#166">166</a>         }
<a name="167" href="#167">167</a>         <strong>return</strong> ed;
<a name="168" href="#168">168</a>     }
<a name="169" href="#169">169</a> 
<a name="170" href="#170">170</a>     <em>/**<em>*</em></em>
<a name="171" href="#171">171</a> <em>     * Translate the search into one using the standard search params</em>
<a name="172" href="#172">172</a> <em>     * @param search</em>
<a name="173" href="#173">173</a> <em>     * @return the translated search</em>
<a name="174" href="#174">174</a> <em>     */</em>
<a name="175" href="#175">175</a>     <strong>public</strong> <strong>static</strong> Search translateStandardSearch(Search search) {
<a name="176" href="#176">176</a>         Search togo = search;
<a name="177" href="#177">177</a>         <strong>if</strong> (search == <strong>null</strong>) {
<a name="178" href="#178">178</a>             togo = <strong>new</strong> Search();
<a name="179" href="#179">179</a>         } <strong>else</strong> {
<a name="180" href="#180">180</a>             EntityDataUtils.translateSearchReference(search, CollectionResolvable.SEARCH_USER_REFERENCE, 
<a name="181" href="#181">181</a>                     <strong>new</strong> String[] {<span class="string">"userReference"</span>,<span class="string">"userId"</span>,<span class="string">"userEid"</span>,<span class="string">"user"</span>}, <span class="string">"/user/"</span>);
<a name="182" href="#182">182</a>             EntityDataUtils.translateSearchReference(search, CollectionResolvable.SEARCH_LOCATION_REFERENCE, 
<a name="183" href="#183">183</a>                     <strong>new</strong> String[] {<span class="string">"locationReference"</span>,<span class="string">"locationId"</span>,<span class="string">"location"</span>,<span class="string">"siteReference"</span>,<span class="string">"siteId"</span>,<span class="string">"site"</span>,<span class="string">"groupReference"</span>,<span class="string">"groupId"</span>,<span class="string">"group"</span>}, <span class="string">"/site/"</span>);
<a name="184" href="#184">184</a>             EntityDataUtils.translateSearchReference(search, CollectionResolvable.SEARCH_TAGS, 
<a name="185" href="#185">185</a>                     <strong>new</strong> String[] {<span class="string">"tag"</span>,<span class="string">"tags"</span>}, <span class="string">""</span>);
<a name="186" href="#186">186</a>         }
<a name="187" href="#187">187</a>         <strong>return</strong> togo;
<a name="188" href="#188">188</a>     }
<a name="189" href="#189">189</a> 
<a name="190" href="#190">190</a>     <em>/**<em>*</em></em>
<a name="191" href="#191">191</a> <em>     * Adds in a search restriction based on existing restrictions,</em>
<a name="192" href="#192">192</a> <em>     * this is ideally setup to convert restrictions into one that the developers expect</em>
<a name="193" href="#193">193</a> <em>     */</em>
<a name="194" href="#194">194</a>     <strong>public</strong> <strong>static</strong> <strong>boolean</strong> translateSearchReference(Search search, String key, String[] keys, String valuePrefix) {
<a name="195" href="#195">195</a>         <strong>boolean</strong> added = false;
<a name="196" href="#196">196</a>         <strong>if</strong> (search.getRestrictionByProperty(key) == <strong>null</strong>) {
<a name="197" href="#197">197</a>             Restriction r = findSearchRestriction(search, key, keys, valuePrefix);
<a name="198" href="#198">198</a>             <strong>if</strong> (r != <strong>null</strong>) {
<a name="199" href="#199">199</a>                 search.addRestriction( r );
<a name="200" href="#200">200</a>             }
<a name="201" href="#201">201</a>         }
<a name="202" href="#202">202</a>         <strong>return</strong> added;
<a name="203" href="#203">203</a>     }
<a name="204" href="#204">204</a> 
<a name="205" href="#205">205</a>     <em>/**<em>*</em></em>
<a name="206" href="#206">206</a> <em>     * Finds if there are any search restrictions with the given properties, if so it returns the Restriction,</em>
<a name="207" href="#207">207</a> <em>     * the value will have the given prefix appended to it's string value if it does not have it,</em>
<a name="208" href="#208">208</a> <em>     * the returned restriction will have the key set to the input key,</em>
<a name="209" href="#209">209</a> <em>     * otherwise returns null</em>
<a name="210" href="#210">210</a> <em>     */</em>
<a name="211" href="#211">211</a>     <strong>public</strong> <strong>static</strong> Restriction findSearchRestriction(Search search, String key, String[] keys, String valuePrefix) {
<a name="212" href="#212">212</a>         Restriction r = search.getRestrictionByProperties(keys);
<a name="213" href="#213">213</a>         <strong>if</strong> (r != <strong>null</strong>) {
<a name="214" href="#214">214</a>             Object value = r.getValue();
<a name="215" href="#215">215</a>             <strong>if</strong> (valuePrefix != <strong>null</strong>) {
<a name="216" href="#216">216</a>                 String sval = r.getStringValue();
<a name="217" href="#217">217</a>                 <strong>if</strong> (!sval.startsWith(valuePrefix)) {
<a name="218" href="#218">218</a>                     value = valuePrefix + sval;
<a name="219" href="#219">219</a>                 }
<a name="220" href="#220">220</a>             }
<a name="221" href="#221">221</a>             r = <strong>new</strong> Restriction(key, value);
<a name="222" href="#222">222</a>         }
<a name="223" href="#223">223</a>         <strong>return</strong> r;
<a name="224" href="#224">224</a>     }
<a name="225" href="#225">225</a> 
<a name="226" href="#226">226</a>     <em>/**<em>*</em></em>
<a name="227" href="#227">227</a> <em>     * Finds a map value for a key (or set of keys) if it exists in the map and returns the string value of it</em>
<a name="228" href="#228">228</a> <em>     * @param map any map with strings as keys</em>
<a name="229" href="#229">229</a> <em>     * @param keys an array of keys to try to find in order</em>
<a name="230" href="#230">230</a> <em>     * @return the string value OR null if it could not be found for any of the given keys</em>
<a name="231" href="#231">231</a> <em>     */</em>
<a name="232" href="#232">232</a>     <strong>public</strong> <strong>static</strong> String findMapStringValue(Map&lt;String, ?> map, String[] keys) {
<a name="233" href="#233">233</a>         String value = <strong>null</strong>;
<a name="234" href="#234">234</a>         Object val = findMapValue(map, keys);
<a name="235" href="#235">235</a>         <strong>if</strong> (val != <strong>null</strong>) {
<a name="236" href="#236">236</a>             <strong>try</strong> {
<a name="237" href="#237">237</a>                 value = val.toString();
<a name="238" href="#238">238</a>             } <strong>catch</strong> (RuntimeException e) {
<a name="239" href="#239">239</a>                 <em class="comment">// in case the to string fails</em>
<a name="240" href="#240">240</a>                 value = <strong>null</strong>;
<a name="241" href="#241">241</a>             }
<a name="242" href="#242">242</a>         }
<a name="243" href="#243">243</a>         <strong>return</strong> value;
<a name="244" href="#244">244</a>     }
<a name="245" href="#245">245</a> 
<a name="246" href="#246">246</a>     <em>/**<em>*</em></em>
<a name="247" href="#247">247</a> <em>     * Finds a map value for a key (or set of keys) if it exists in the map and returns the value of it</em>
<a name="248" href="#248">248</a> <em>     * @param map any map with strings as keys</em>
<a name="249" href="#249">249</a> <em>     * @param keys an array of keys to try to find in order</em>
<a name="250" href="#250">250</a> <em>     * @return the value OR null if it could not be found for any of the given keys</em>
<a name="251" href="#251">251</a> <em>     */</em>
<a name="252" href="#252">252</a>     <strong>public</strong> <strong>static</strong> Object findMapValue(Map&lt;String, ?> map, String[] keys) {
<a name="253" href="#253">253</a>         <strong>if</strong> (map == <strong>null</strong> || keys == <strong>null</strong>) {
<a name="254" href="#254">254</a>             <strong>return</strong> <strong>null</strong>;
<a name="255" href="#255">255</a>         }
<a name="256" href="#256">256</a>         Object value = <strong>null</strong>;
<a name="257" href="#257">257</a>         <strong>try</strong> {
<a name="258" href="#258">258</a>             <strong>for</strong> (<strong>int</strong> i = 0; i &lt; keys.length; i++) {
<a name="259" href="#259">259</a>                 String key = keys[i];
<a name="260" href="#260">260</a>                 <strong>if</strong> (map.containsKey(key)) {
<a name="261" href="#261">261</a>                     Object oVal = map.get(key);
<a name="262" href="#262">262</a>                     <strong>if</strong> (oVal != <strong>null</strong>) {
<a name="263" href="#263">263</a>                         value = oVal;
<a name="264" href="#264">264</a>                         <strong>break</strong>;
<a name="265" href="#265">265</a>                     }
<a name="266" href="#266">266</a>                 }
<a name="267" href="#267">267</a>             }
<a name="268" href="#268">268</a>         } <strong>catch</strong> (RuntimeException e) {
<a name="269" href="#269">269</a>             <em class="comment">// in case the given map is not actually of the right types at runtime</em>
<a name="270" href="#270">270</a>             value = <strong>null</strong>;
<a name="271" href="#271">271</a>         }
<a name="272" href="#272">272</a>         <strong>return</strong> value;
<a name="273" href="#273">273</a>     }
<a name="274" href="#274">274</a> 
<a name="275" href="#275">275</a>     <em>/**<em>*</em></em>
<a name="276" href="#276">276</a> <em>     * Puts the values of 2 maps together such that the values from the newStuff map are added to the</em>
<a name="277" href="#277">277</a> <em>     * original map only if they are not already in the the original</em>
<a name="278" href="#278">278</a> <em>     * @param &lt;T></em>
<a name="279" href="#279">279</a> <em>     * @param &lt;S></em>
<a name="280" href="#280">280</a> <em>     * @param original</em>
<a name="281" href="#281">281</a> <em>     * @param newStuff</em>
<a name="282" href="#282">282</a> <em>     */</em>
<a name="283" href="#283">283</a>     <strong>public</strong> <strong>static</strong> &lt;T,S> <strong>void</strong> putAllNewInMap(Map&lt;T,S> original, Map&lt;T,S> newStuff) {
<a name="284" href="#284">284</a>         <strong>if</strong> (original == <strong>null</strong>) {
<a name="285" href="#285">285</a>             <strong>throw</strong> <strong>new</strong> IllegalArgumentException(<span class="string">"original map cannot be null"</span>);
<a name="286" href="#286">286</a>         }
<a name="287" href="#287">287</a>         <strong>if</strong> (newStuff != <strong>null</strong>) {
<a name="288" href="#288">288</a>             <strong>if</strong> (original.isEmpty()) {
<a name="289" href="#289">289</a>                 original.putAll( newStuff );
<a name="290" href="#290">290</a>             } <strong>else</strong> {
<a name="291" href="#291">291</a>                 <strong>for</strong> (Entry&lt;T,S> entry : newStuff.entrySet()) {
<a name="292" href="#292">292</a>                     <strong>if</strong> (original.containsKey(entry.getKey())) {
<a name="293" href="#293">293</a>                         <strong>continue</strong>;
<a name="294" href="#294">294</a>                     }
<a name="295" href="#295">295</a>                     original.put(entry.getKey(), entry.getValue());
<a name="296" href="#296">296</a>                 }
<a name="297" href="#297">297</a>             }
<a name="298" href="#298">298</a>         }
<a name="299" href="#299">299</a>     }
<a name="300" href="#300">300</a> 
<a name="301" href="#301">301</a>     <em>/**<em>*</em></em>
<a name="302" href="#302">302</a> <em>     * Get the values from a map and convert them to strings,</em>
<a name="303" href="#303">303</a> <em>     * nulls pass through</em>
<a name="304" href="#304">304</a> <em>     * @param m</em>
<a name="305" href="#305">305</a> <em>     * @return the keys of any map as strings and the values as they were</em>
<a name="306" href="#306">306</a> <em>     */</em>
<a name="307" href="#307">307</a>     @SuppressWarnings(<span class="string">"unchecked"</span>)
<a name="308" href="#308">308</a>     <strong>public</strong> <strong>static</strong> Map&lt;String, Object> extractMapProperties(Map m) {
<a name="309" href="#309">309</a>         Map&lt;String, Object> props = <strong>null</strong>;
<a name="310" href="#310">310</a>         <strong>if</strong> (m == <strong>null</strong> || m.isEmpty()) {
<a name="311" href="#311">311</a>             props = <strong>null</strong>;
<a name="312" href="#312">312</a>         } <strong>else</strong> {
<a name="313" href="#313">313</a>             props = <strong>new</strong> HashMap&lt;String, Object>();
<a name="314" href="#314">314</a>             <strong>for</strong> (Entry entry : (Set&lt;Entry>) m.entrySet()) {
<a name="315" href="#315">315</a>                 Object key = entry.getKey();
<a name="316" href="#316">316</a>                 <strong>if</strong> (key != <strong>null</strong>) {
<a name="317" href="#317">317</a>                     Object value = entry.getValue();
<a name="318" href="#318">318</a>                     <strong>if</strong> (value != <strong>null</strong>) {
<a name="319" href="#319">319</a>                         <strong>if</strong> (Serializable.<strong>class</strong>.isAssignableFrom(key.getClass())) {
<a name="320" href="#320">320</a>                             <em class="comment">// only use simple types that can be serialized</em>
<a name="321" href="#321">321</a>                             props.put(key.toString(), value);
<a name="322" href="#322">322</a>                         }
<a name="323" href="#323">323</a>                     }
<a name="324" href="#324">324</a>                 }
<a name="325" href="#325">325</a>             }
<a name="326" href="#326">326</a>         }
<a name="327" href="#327">327</a>         <strong>return</strong> props;
<a name="328" href="#328">328</a>     }
<a name="329" href="#329">329</a> 
<a name="330" href="#330">330</a> }
</pre>
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